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7. (4.12.2006) Beziehungen zwischen den Organismen

symbiosis

(living together of organisms of different species, which is useful for one or more partners)

Proto cooperation (A casual relationship between the Different Species in the draw all participants their benefits but also without would be another viable - Hummel and red clover)







commensalism (A relationship in which only one species has an advantage, but the other has no apparent disadvantage - scavengers -)






mutualism (. coexistence for the benefit of both species - the sea anemone that lives in the cochlea of \u200b\u200bthe hermit crab Cancer is protected, sea anemone prof benefits from the food residue -)

Eusymbiose (Partner alone are no longer viable - leaf-cutting ants and fungi, food and propagation -)

Parasitismus (Zusammenleben bei dem der Parasit einen Vorteil gegenüber dem Wirt genießt bzw. dieser sogar geschädigt wird. Es gibt 3 Arten des Parasitismus: Wirt lebt während er Symbiose, Wirt stibt relativ schnell, Wirt wird vorher schon abgetötet)

Sybiosen können aber auch über den Raum definiert werden:

Ektosymbiose (Partner sind körperlich separately - flowers and pollinators, clown fish and sea anemone -)
endosymbiosis (One of the partners is taken into the body of the other - intestinal bacteria -)

The various reasons are to Synbiosen respond:

- food symbiosis (leaf-cutting ants and fungi)
- reproductive symbiosis (bees and flowering plants)
- symbiosis with protection from predators (ants to aphids)

- Ektosymbiose (hermit crab and parasite Rose)
- endosymbiosis (fungi and algae)
- commensalism (coastal and shark sucker)

... theme for me was very clear where perhaps do a little more explanation would be good: to take various reasons Synbiosen.

source http://de.wikipedia.org/wiki/Hauptseite

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6. (27.11.2006) Abiotische/ Biotische Faktoren

Abiotic factors :
the abiotic factors that affect an organism. For example: Light, temerature, water, nutrients, wind, ...


Biotic factors :
If the influences of the living environment. For example, parasites, pollination, seed dispersal, feeding relationships, ...

Furthermore, a distinction is inter-and intra-specific factors (competition), depending on whether the influence of individuals of their own species or other type starts.

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6. (27.11.2006) Fortpflanzung der Samenpflanzen

reproduction of flowering plants

are in bloom, the so-called reproductive organs. The stamens are the Pollen sacs where the pollen grains in turn generates
be formed in the carpels, the embryo sac. The male part grows out in the form of the pollen tube from the pollen grain. It grows through the style to the embryo sac and fertilize the egg there.

The embryo sac is the female part in which the egg is. Both male and female part of the flower have a half set of chromosomes (habloid).

arrives at the gymnosperms the pollen directly on the ovules. In the angiosperms he first arrived on the stigma, that is un-pollination between fertilization a longer time interval than is the Nacksamern. merge

When sexual reproduction (simple reproduction) two sex cells together. Fertilization happens via external fertilization (sex cells of different plants) or self-fertilization (sex cells of the same plant).

In asexual reproduction means the reproduction in which only the genes of one parent are included. Say it is an identical copy.

The pollination can in turn break down into two categories: self-pollination (pollination by pollen from the same plant) and cross-pollination (Bestäubung durch Pollen einer anderen Pflanze).

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5. (20.11.2006) Aufbau/ Funktion: Blätter

Blatt/ Blätter

Zusammengestezte Blätter und ihre verschiedenen Formen der Blattspreiten (= durch tiefe Einschnitte in getrennte Teilblättchen zerlegt):

Blätter haben die Funktion des Gasaustausches inne, sprich sie geben den Wasserdampf ab, erzeugen somit einen Unterdruck im Blatt und dieser zieht neue Flüssigkeit aus den Wurzeln bzw. dem Stamm. Weiters ist es für die Fotosyntese zuständig. Für diese Funktionen sind verschiedene Gewebe zuständig:






















- Kutikula (Schutz gegen Wasser)
- Palisadengewebe (Fotosyntese)
- Schwammgewebe (Fotosyntese, Transport of water vapor)
- intercellular spaces (airing)
- stomatal (release of water vapor, gas exchange)
- lower epidermis (Protection)
- vascular bundles (water and oxygen transport, consolidation)
- Upper Epidermis (Protection)


The leaves have adapted by different transformations to their environment:

- leaf tendrils (there have threadlike, unbranched or branched organs formed the plant to serve Klatten Eg. pea, Pumpkin)





- Journal thorns (parts of the leaf have transformed themselves through lignification or strengthening tissue in rigid bodies to protect the health and adaptation to dry conditions Eg cacti.. Thistle)




- memory leaves (leaves form in fleshy, shell-like onion leaves to seat in the folded stem axis serves the water and mass storage example: onions, snowdrop, tulip)...





- Blattsukkulente Pflanzen (Blätter wandeln sich zu fleischig verdickten Wasserspeichern um, dies dient der Anpassung an trockene Bedingungen Z.B.: Mauerpfeffer, Hauswurz, ...)